NCERT Exemplar Solutions for Class 12 Physics Chapter 5

About NCERT Exemplar Solutions for Class 12 Physics Chapter 5 – Magnetism and Matter

The fifth chapter of Class 12 Physics, Magnetism and Matter, explores the natural phenomenon of magnetism, its sources, and its effects on materials. While the previous chapter focused on the magnetic fields produced by moving charges and currents, this one deals with the intrinsic magnetic properties of matter and the behavior of substances in magnetic fields. The NCERT Exemplar Solutions for this chapter are an excellent resource to help students deepen their conceptual understanding and practice a wide variety of application-based questions. The chapter begins by discussing the earth’s magnetism. Students learn that the earth itself behaves like a giant magnet with a magnetic field that affects compass needles and navigation. The Exemplar problems guide learners through concepts such as magnetic declination, inclination, and horizontal component of earth’s magnetic field. These solutions ensure that students develop clarity in visualizing how the earth’s magnetic field varies with location and how it is measured. Another important part of the chapter is the study of magnetization and magnetic intensity. The NCERT Exemplar Solutions help students understand the distinction between magnetic field, magnetic moment, and magnetization. Problems are designed to illustrate how the alignment of atomic magnetic moments gives rise to different magnetic properties in materials. By practicing these problems, students build a strong conceptual foundation for understanding the classification of materials into diamagnetic, paramagnetic, and ferromagnetic substances.

The chapter also highlights hysteresis and the behavior of ferromagnetic materials under changing magnetic fields. Exemplar problems in this section help students analyze the importance of hysteresis loops in selecting materials for devices such as transformers and permanent magnets. These practical applications make the subject more relatable and interesting. Another key aspect of this chapter is the torque on a magnetic dipole in a uniform magnetic field. The Exemplar Solutions provide step-by-step explanations of how to solve problems involving magnetic dipoles, potential energy, and the analogy between electric dipoles and magnetic dipoles. Such comparisons enhance conceptual clarity and allow students to connect different areas of physics. Towards the end, students also encounter problems related to bar magnets and their equivalence to solenoids. The Exemplar Solutions demonstrate how magnetic field lines of a bar magnet resemble those of a solenoid, reinforcing the unity of concepts covered in earlier chapters. In summary, the NCERT Exemplar Solutions for Magnetism and Matter provide detailed practice material that strengthens both theoretical knowledge and problem-solving skills. By engaging with these problems, students not only prepare thoroughly for board examinations but also gain confidence for competitive exams like JEE and NEET. This chapter bridges the gap between natural magnetism and technological applications, making it a vital part of Class 12 Physics.